From b8b1ac283d2fbf322e35f8b94939c81585d9c6c3 Mon Sep 17 00:00:00 2001
From: "Edward Z. Yang" <edwardzyang@thewritingpot.com>
Date: Wed, 11 Jun 2008 18:54:19 +0000
Subject: [PATCH] [2.1.5] [MFH] Fix regression in FontFamily

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/branches/php4@1792 48356398-32a2-884e-a903-53898d9a118a
---
 library/HTMLPurifier/AttrDef/CSS/FontFamily.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/HTMLPurifier/AttrDef/CSS/FontFamily.php b/library/HTMLPurifier/AttrDef/CSS/FontFamily.php
index d64d728e..eef3c179 100644
--- a/library/HTMLPurifier/AttrDef/CSS/FontFamily.php
+++ b/library/HTMLPurifier/AttrDef/CSS/FontFamily.php
@@ -68,7 +68,7 @@ class HTMLPurifier_AttrDef_CSS_FontFamily extends HTMLPurifier_AttrDef
             }
             // $font is a pure representation of the font name
             
-            if (ctype_alnum($font)) {
+            if (ctype_alnum($font) && $font !== '') {
                 // very simple font, allow it in unharmed
                 $final .= $font . ', ';
                 continue;